To create a new wallet in Jaxx Liberty, you first need to download the application on your device. When fully launched, Jaxx Liberty will be supported on eight different platforms. Currently it has been made available only for Android devices and as a Chrome Extension. You can download it on your favorite platform from https://jaxx.io/downloads.html.
Once you have downloaded and installed Jaxx Liberty, you will see a page like this:
Here, you will need to click on "Create New Wallet" which will invite you to review the Terms of Service, and take you through the wallet creation process.
Once you come across the "Welcome to Jaxx Liberty" page, you are all set to go.